Mainstay Emergency Drinking Water 4.225 oz (60 Pack) 5 year shelf life from date of manufacture. Guaranteed 3 year shelf life when purchased. No special storage needed - can withstand temperatures from -40F to 210F (-40C to 99C) No oxygen transfer (no chance of bacterial contamination) U.S. Coast Guard Approved Each case contains 60 (4.225 oz) packs.